To compute end of hospital day two, count the arrival date as hospital day one. If antithrombotic therapy was administered by 11:59 PM of hospital day two, answer “Yes” for this data element. E.g, Patient arrives at the hospital on Monday at 05:00, answer “Yes” if antithrombotic therapy was administered on or before 23:59 on Tuesday. If patient arrived at the hospital at 23:30 on Monday, answer “Yes” if antithrombotic therapy was administered on or before 23:59 on Tuesday.

Reasons for not prescribing antithrombotic therapy must be documented by a physician, nurse practitioner or physician assistant. If reasons are not mentioned in the context of antithrombotics, do not make inferences (e.g., do not assume that antrithombotics are not being prescribed because of a bleeding disorder unless documentation explicitly states so.)

Conditions or factors making the administration of antithrombotic therapy inadvisable, inappropriate and/or undesirable are documented (appropriate response is “NC”, a documented reason exists for not administering this therapy). This may include: